RE: [PATCH] x86/resctrl: Fix unused variable warning in cache_alloc_hsw_probe()

[Luck, Tony]

> >     if (wrmsr_safe(MSR_IA32_L3_CBM_BASE, max_cbm, 0))
> >             return;
> >
> > -   rdmsr(MSR_IA32_L3_CBM_BASE, l, h);
> > +   rdmsrl(MSR_IA32_L3_CBM_BASE, l3_cbm_0);
>
> You are writing 32 bit and reading 64 bit. Why don't you change both to 64
> bit?

wrmsr_safe() writes all 64-bits ... just gets those bits as a pair
of 32-bit arguments for the low and high halves.

I could switch that to wrmsrl_safe() and change max_cbm to be "u64"
to make write & read match. Would that be better?

-Tony